#include <stdio.h>
#include <time.h>
#include <stdlib.h>

int input (int t)
{
    int a;
    do
    {
        printf("Please count:");
        scanf("%d",&a);
        if(a>2||a<1||t+a>30)
        printf("Error input,again!");
        else
        printf("You count:%d\n",t+a);
    }while(a>2||a<1||t+a>30);
    return (t+a);
}

int copu(int s)
{
    int c;
    printf("Computer count:");
    if((s+1)%3==0)
    printf("%d\n",++s);
    else if((s+2)%3==0)
    {
        s+=2;
        printf("%d\n",s);
    }
    else
    {
        c = random() % 2 + 1;
        s+=c;
        printf("%d\n",s);
    }
    return s;
}

int main()
{
    int tol = 0;
    printf("\n**********catch thirty************\n");
    printf("Game Begin\n");
    //randomize();
    if((random() % 2)  == 1)
    tol = input(tol);
    while(tol!=30)
    if((tol=copu(tol))==30)
    printf("You lose!\n");
    else
    if((tol = input(tol)) == 30)
    printf("I lose!\n");
    printf("**************Game Over**************\n");
}

